float_val: 0.42
double_val: 0.42
int32_val: 42
sint32_val: -42
sfixed32_val: -42
int64_val: 42
sint64_val: -42
sfixed64_val: -42
uint32_val: 42
fixed32_val: 42
uint64_val: 42
fixed64_val: 42
string_val: "forty two"
bytes_val: "forty two"
bool_val: true
